# Improvements * General and User Interface- A custom user agent preference has been added to opera:config* Display and Scripting- Improved pipelining, JavaScript, and Turbo# Fixes and Stability Enhancements * General and User Interface- Fixed an issue with missing region definitions for some regions- Fixed UI artifacts in viewport when scrolling a page containing a fixed element with 100% height- Fixed an issue with the tab bar- Resolved an issue where hovering the close button in an inactive tab would steal its hover state, instead of propagating it- Fixed incorrect address bar focus and update behavior- Fixed an issue where search suggestion latency could provide incorrect suggestions under certain conditions- Cancelling address field dropdown now reverts it to its previous state- Fixed several minor issues with browser history- Fixed an issue with Speed Dial entries not updating under certain conditions* Display and Scripting- Behvior improvements and enhancements to HTML5 Drag and Drop- Fixed Canvas clearRect behavior- Resolved an issue where XMLHttpRequest.status becomes 0 instead of 401 or 407 on cached response- Fixed artifacts in WebM videos- Fixed an issue with scripts saturating setInterval()- Corrected responseXML's null behavior- Fixed incorrect behavior with window.close and a user-initiated event- Resolved an issue where clearTimeout() would not remove timeout- Fixed a clipping error when combining CSS transforms and opacity- Fixed some issues with painting and repainting that could occur under certain conditions- Fixed an issue with drag and drop resource usage* Mail, News, Chat- Fixed an issue with long attachment names preventing some UI elements from showing properly* Network and Site-Specific- Resolved some issues with Google sites- Resolved an issue that caused some third-party login systems to fail under certain conditions- Fixed an issue with HTTPS connections and proxies* Security- Fixed an issue where hidden keyboard navigation could allow cross site scripting or code execution- Fixed an issue where a combination of clicks and key presses could lead to cross site scripting or code execution- Fixed an issue where cross-domain JSON resources may be exposed as JavaScript variable data- Fixed an issue where carefully timed reloads, redirects, and navigation could spoof the address field- Fixed an issue where pages could prevent navigation to a target page, spoofing the address field